An avalanche takes place when ice and snow move down a slope with great speed. what effect does friction have on its rate of movement? a. friction causes the avalanche to move rapidly. b. friction creates a curved surface that decreases the speed. c. the speed of the avalanche decreases with increased friction. d. the speed of the avalanche increases with increased friction. e. friction does not have any effect on the avalanche.

The velocity of car is 80.0 miles per hour. what is the velocity of car in meters per second? (1 km -0.621 miles) m/s

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?